有道词典案例

来源：互联网发布：ubuntu des 解密编辑：程序博客网时间：2024/05/21 14:59

界面交互编写：

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:id="@+id/activity_main"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    tools:context="bzu.edu.cn.youdao.MainActivity">    <Button        android:id="@+id/myButton02"        android:layout_width="200px"        android:layout_height="120px"        android:text="清空"        android:layout_x="270px"        android:layout_y="35px"        android:layout_alignParentTop="true"        android:layout_alignParentRight="true"        android:layout_alignParentEnd="true" />    <Button        android:id="@+id/myButton01"        android:layout_width="200px"        android:layout_height="120px"        android:text="查询"        android:layout_x="205px"        android:layout_y="35px"        android:layout_alignParentTop="true"        android:layout_toLeftOf="@+id/myButton02"        android:layout_toStartOf="@+id/myButton02"        android:layout_marginRight="17dp"        android:layout_marginEnd="17dp" />    <EditText        android:id="@+id/myEditText1"        android:layout_width="600px"        android:layout_height="100px"        android:textSize="18sp"        android:layout_x="5px"        android:layout_y="32px"        android:layout_alignBottom="@+id/myButton01"        android:layout_toLeftOf="@+id/myButton01"        android:layout_toStartOf="@+id/myButton01" />    <WebView        android:id="@+id/myWebView1"        android:layout_width="330px"        android:layout_height="300px"        android:layout_x="7px"        android:layout_y="90px"        android:background="@android:color/black"        android:focusable="false"        android:layout_marginTop="17dp"        android:layout_marginLeft="18dp"        android:layout_marginStart="18dp"        android:layout_below="@+id/myButton01"        android:layout_alignParentLeft="true"        android:layout_alignParentStart="true" /></RelativeLayout>

MainActivity:

package bzu.edu.cn.youdao;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.webkit.WebView;import android.widget.Button;import android.widget.EditText;import android.widget.Toast;public class MainActivity extends AppCompatActivity {    //查询按钮申明    private Button myButton01;    //清空按钮申明    private Button myButton02;    //输入框申明    private EditText mEditText1;    //加载数据的WebView申明    private WebView mWebView1;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        myButton01 = (Button) findViewById(R.id.myButton01);        myButton02 = (Button) findViewById(R.id.myButton02);        mEditText1 = (EditText) findViewById(R.id.myEditText1);        mWebView1 = (WebView) findViewById(R.id.myWebView1);        //查询按钮添加事件        myButton01.setOnClickListener(new Button.OnClickListener() {            public void onClick(View arg0) {                String strURL = (mEditText1.getText().toString());                strURL = strURL.trim();                //如果查询内容为空提示                if (strURL.length() == 0) {                    Toast.makeText(MainActivity.this, "查询内容不能为空", Toast.LENGTH_LONG).show();                }                //否则则以参数的形式从http://dict.youdao.com/m取得数据，加载到WebView里.                else {                    strURL = "http://dict.youdao.com/m/search?keyfrom=dict.mindex&q=" + strURL;                    mWebView1.loadUrl(strURL);                }            }        });        //http://dict.youdao.com/m/search?keyfrom=dict.mindex&q=happy        //清空按钮添加事件，将EditText置空myButton02.setOnClickListener(new Button.OnClickListener(){    public void onClick(View v)    {        mEditText1.setText("");    }});    }}

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